Discovery of short-period binary millisecond pulsars in four globular clusters

Details Discovery of short-period binary millisecond pulsars in four globular clusters Discovery of short-period binary millisecond pulsars in four globular clusters

2000-10-13

arxiv.org/abs/astro-ph/0010272v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figs, 1 table - Accepted by Astrophysical Journal Letters

Scientific paper

10.1086/319096

We report the discovery using the Parkes radio telescope of binary millisecond pulsars in four clusters for which no associated pulsars were previously known. The four pulsars have pulse periods lying between 3 and 6 ms. All are in circular orbits with low-mass companions and have orbital periods of a few days or less. One is in a 1.7-hour orbit with a companion of planetary mass. Another is eclipsed by a wind from its companion for 40% of the binary period despite being in a relatively wide orbit. These discoveries result from the use of improved technologies and prove that many millisecond pulsars remain to be found in globular clusters.

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